The 10-year-old boy was sitting in the back seat of his grandparent's vehicle with his grandpa in the driver's seat Thursday afternoon while the child's grandma went to get a few things from the Staples office store on Lake Tahoe Boulevard.

According to the South Lake Tahoe Police Department, the boy's grandpa is a California peace officer from out of the area and is authorized to carry a loaded firearm in the vehicle.

The child's grandpa had a fully loaded pistol in the closed glove box of the vehicle, and when he got out to walk their dog in the parking lot, the boy climbed into the front seat and grabbed the gun, police said.

As the boy's grandma left the store and returned to the vehicle, the child accidentally discharged the weapon. A bullet struck a finger on the boy's right hand, officers said.

Officials said the boy sustained serious damage to his finger, but his injuries were not life-threatening.

Officers secured the weapon as evidence. The investigation was submitted to the El Dorado County District Attorney's Office for review and will be looked at to possibly file child endangerment charges.

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